This post is on the Other BDSM web board.
| Thu 3 Sep 09, 9:31 AM cinder UK(CR), 7 yrs |
Hi Can anyone tell me which hooks/ bolts etc you need to put through the ceiling into the rafters which could support my weight? (currently 10 and a half stone). The beams are just over 100 years old. Preferably able to buy in B and Q because it's nearby. Thanks N x |
| 3 Sep 09, 9:44 AM LovingLord 3 yrs |
The best thing to do is ask someone at B&Q. Pretend you're mounting some art exhibit if they ask what it's for. Bolts will always hold more than screws, not because they're stronger but because the nut on the other end offers up much more resistance than the thread of a screw ever could. I would suggest you ask what kind of bolts could support around 130kg safely (double your weight). I think you'll find that with suitable washers, most bolts will do the job (metal, especially steel, is much stronger when pulled than compressed - the 12mm bolts I bolted into my 4x4's chassis bar can take several tons of pressure) - the trick is finding one that has a hook on the end - preferably forged with a hook, not welded on (welds aren't nearly as strong as forged metal, although they still are very, very strong). If your confidence fails you, ask for 12mm nut/bolts. You'll pull the house down long before they fail. Just make sure you measure the rafters that they're going through, so you know the hole you make won't be too big and weaken the rafter. Inteligence does not equate to wisdom. |
| 3 Sep 09, 9:57 AM Lj_switch UK, 3 yrs |
can you get to both surfaces of the rafter, ie, from above as well as below? because as long as you use welded eyelets (ie the loop you will link onto is continuous metal, not simply folded into a circle) then anything from 6mm up will do the job. Make sure you use large diameter washers, particuarly on the top side, to spread the load, and use nyloc nuts, so they don't slowly unscrew in use! I was looking to design a suspension frame for a Pro-Domme, and investigated the types at a local "Fixings" centre. There's no need to specify exactly what you are going to suspend. In the vanilla world of fixings, a suspension bolt is nothing more than that, it's your perverted mind that throws in the alternative meaning *lol* |
| 3 Sep 09, 10:11 AM cinder UK(CR), 7 yrs |
Thanks for the info - useful N x |
| 3 Sep 09, 10:21 AM rupert_bare UK(B), 3 yrs |
On a house over 100 years old the critical thing may well be the rafters. Any welded eye bolt long enough to go through the rafters will be thick enough that you dont have to worry about the bolt but use very large washer and nyloc nut. Some old houses have rafters only intended to support the ceiling and not for storage space. If you dont have a loft hatch this is a clue. Start with a visual inspection of the rafter to see if it has deteriorated and then providing it is at least 6 inches from top to bottom stand on it, if it feels firm start to bounce on it. Gently at first. Providing you are not now in the room below it should be fine to take your weight. If you want to be extra safe put a plank on top of the rafters so the weight is carried by the beams either side as well but still run the eye bolt through that plank as well. While you are up there have a look to see if theres room for a dungeon, rafters and roof trusses would make excellent tethering points. Edited 3 Sep 09, 10:23 AM by rupert_bare |
| 3 Sep 09, 9:10 PM altheegg 6 yrs |
coach screw , that's a bolt that you can screw in with a square head using a spanner, drill a lead hole first. Al Chippy -- Always waiting. |
| 3 Sep 09, 10:10 PM sotto_voce UK(BS), 10 yrs |
I agree with rupertroper about the need to check what size ceiling joists you have (presumably you mean ceiling joists rather than the rafters). I have a 160+ year old house and the ceiling joists in the roof void are only 4"x2" or 5"x2" and they span 16' in some rooms. (The joists which actually support floors are all 9".) So in my case I would definitely prefer to put decent size timber across a few joists and bolt through that, to spread the load. Then, of course, I would have to pack it as the joists in the roof void are uneven. - The joys of an old house! (Mine you I have an interesting room in the basement which I believe was originally a large water cistern but could make a very useful smallish dungeon or a nice 'cell'. So old houses do have benefits!) |